JP4208870B2 - Surface treatment equipment for long objects such as films - Google Patents

Description

  The present invention relates to a surface treatment apparatus that performs charge removal and dust removal after corona treatment of a surface of a long object to be processed such as a film.

  In the film processing step, when coating or the like, the film surface is modified by corona treatment. At this time, since the film is charged by the corona treatment, for example, as disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 2003-292650), the charge is removed immediately after the corona treatment.

  At this time, since simple charge removal cannot remove charge patterns in which positive and negative charged portions are mixed in a complicated manner, for example, as disclosed in Patent Document 2 (Japanese Patent Application Laid-Open No. 2005-222925), high-quality coating is performed. When obtaining a film, in order to eliminate the charge up to the charged pattern that causes coating unevenness, the ion generating electrode that generates positive and negative ions is opposed to the ion attracting electrode that attracts ions, and the ion is discharged at high density. A suction type static eliminator is also used. Further, dust removal using a dust removing device is performed after static elimination.

  However, conventionally, since the film is transported in the horizontal direction, the corona treatment device, ion-suction type static eliminator, and dust removal device are distributed separately by changing the horizontal position on the film's horizontal transport line. Was.

Therefore, in a narrow film processing line, it takes a lot of time and money to secure the installation location of each device, add a guide roll to guide the film, change the pass line, etc. The situation was unavoidable.
JP 2003-292650 A JP 2005-222925 A

  The object of the present invention is to integrate the corona treatment device, the ion attraction type static eliminator, and the dust eliminator in one place so that it can be used in a narrow film processing line. In addition to maintaining a uniform discharge gap in the corona treatment device, the corona treatment can be performed on an average, and the life of the discharge electrode can be extended, and a long temperature treatment object can be obtained by corona treatment at a low temperature. The purpose is to prevent deformation.

The surface treatment apparatus of the present invention is the same as the corona treatment apparatus that corona-treats the surface of a long treatment object such as a film and the charge removal apparatus that neutralizes the long treatment object after corona treatment by the corona treatment apparatus. Arrange vertically in the housing.
In the corona treatment device, the horizontally long discharge electrode for corona treatment is placed in contact with the inner peripheral surface of the protective pipe by means of a spring attached to the electrode core at a plurality of locations by installing a horizontally long electrode core in a protective pipe made of a dielectric. The corona treatment discharge electrode is parallel to the horizontally long earth roll, and the long object to be introduced into the housing is guided by the earth roll. However, the corona treatment is performed by corona discharge from the corona treatment discharge electrode.
The static eliminator is configured such that a plurality of positive and negative ion generation electrodes are opposed to the ion attraction electrode with a space therebetween in the vertical direction, and positive and negative ions generated by the positive and negative ion generation electrodes are attracted by the ion attraction electrode, A long object to be processed is passed between the ion attracting electrode and the charge is removed at high density.

  The surface treatment apparatus according to claim 2 further includes a dust removal device installed vertically in the same housing as the corona treatment device and the charge removal device. The dust removal device has a horizontally long suction port member facing the backup roll, and these Between the backup roll and the suction port member, a blower port member that blows air from a horizontally long slit-shaped blower port is installed, and while the long processing target is guided by the backup roll, air is blown from the blower port member. By sucking with the suction port member, the long processing object is removed and guided out of the housing.

  In the surface treatment apparatus according to claim 3, introduction of the long processing object before processing into the housing is performed on one side of the front and rear sides of the housing, and extraction of the long processing target after processing out of the housing is performed on the housing. On the other side before and after.

  In the surface treatment apparatus according to the fourth aspect, the plurality of corona treatment discharge electrodes having the above-described structure are arranged in parallel so that the gaps between the discharge electrodes for the corona treatment are equal.

  In the surface treatment apparatus according to claim 5, each of the plurality of corona treatment discharge electrodes is vertically suspended by an adjustment screw rod on an electrode support bar that is horizontally installed on the housing. .

  In the surface treatment apparatus according to claim 6, the ion attracting electrode of the static eliminator is formed in a plate shape having a vertical surface extending right and left and up and down, and all the positive and negative ion generating electrodes are opposed to the ion attracting electrode.

According to the present invention, the corona treatment device and the static elimination device are arranged one above the other in the same housing, and a long processing object such as a film is introduced into the housing and sequentially passed through these devices within the housing. As a result, corona treatment and high-density static elimination are received at one place on the horizontal conveyance line, so these devices are distributed separately by changing the horizontal position on the horizontal conveyance line. Compared to the conventional method, the time and cost required to install these devices can be saved, the maintenance can be facilitated, and the efficiency of charge removal and dust removal after the corona treatment can be improved.
When the corona treatment discharge electrode is elongated, the discharge gap between the earth roll and the ground roll becomes uneven due to the heat generated by the discharge, but the corona treatment discharge electrode in the present invention is long in the protective pipe made of dielectric. Since a long electrode core is installed to generate a dielectric barrier discharge with the earth roll, the corona treatment can be performed on average while maintaining a uniform discharge gap. Further, the life of the discharge electrode can be extended and the deformation of the long object can be prevented by the corona treatment at a low temperature.
Furthermore, since the electrode core is pressed against the inner peripheral surface of the protective pipe by a spring, it is easy to perform the work when the electrode core is installed in the protective pipe or pulled out for maintenance, and the electrode core is also positioned. It becomes easy.
In discharging device, since it is opposed to a plurality of positive and negative ion-generating electrode vertically spaced plate-like ion attracting electrode to each other, can be done on the average repeat continuously dense neutralization and filtration apparatus Then, since air is blown between the backup roll and the horizontally long suction port member from the horizontally long slit-shaped air port of the air blowing member, and sucked by this horizontally long suction port member, dust removal of a wide long processing object is performed. Can be done on average.

According to the second and subsequent inventions, in addition to the above effects, the following effects are obtained.
<Claim 2>
By the dust removal device installed vertically in the same housing as the corona treatment device and the static elimination device, the air is blown from the horizontally long slit-shaped air blowing port of the air blowing member between the backup roll and the horizontally long suction port member. Since suction is performed by the mouth member, it is possible to remove dust on a wide long processing object on average.

<Claim 3>
The long processing object before processing is introduced into the housing on one side before and after the housing, and the long processing target after processing is led out of the housing on the other side before and after the housing. By simply installing the surface treatment apparatus of the invention in the middle of the horizontal conveyance line, it can be handled without changing the conveyance direction.

<Claim 4>
If a plurality of corona treatment discharge electrodes having the above-described structure are arranged in parallel so that the distance between the discharge electrode and the earth roll is equal, a wide range of corona treatment can be performed on average.

<Claim 5>
The height of each of the discharge electrodes for corona treatment can be adjusted individually by adjusting screw rods, so that the corona treatment can be appropriately adjusted by finely adjusting the discharge gap with the earth roll individually. Can do.

<Claim 6>
Since the ion attracting electrode has a vertical plate shape and all the positive and negative ion generating electrodes are opposed to the ion attracting electrode, it is possible to simplify the static eliminating device that removes electricity at high density and to eliminate ion unevenness by averaging the ion attraction. be able to.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 to 3, the surface treatment apparatus according to the present embodiment includes a corona treatment device 1, an ion suction type static elimination device 2, and a dust removal device 3 in a common housing 4, upper, middle, and lower three stages. After the corona treatment apparatus 1 corona-treats the plastic film 6 introduced and guided by the introduction-side roll 5 installed on the rear side outside the housing 4, the combined station is arranged and installed. Immediately, the ion-suction type static eliminator 2 removes the charge to a high density, and the dust eliminator 3 removes the dust to the front side outside the housing 4. The derived processed film 6 is guided by the derivation-side roll 7 and conveyed to the apparatus for the next process. Note that the upper, middle, and lower positional relationships among the corona treatment device 1, the ion attraction type static eliminator 2, and the dust eliminator 3 may be reversed.

  The corona treatment device 1 is installed in the upper part of the housing 4, and supports a horizontally long earth roll 8 rotatably on the left and right side walls of the housing 4. The earth roll 8 is attached to the outside of the side wall of the housing 4. The film 6 rotated by the roll drive motor 9 and transferred from the introduction-side roll 5 is conveyed to the lower static elimination apparatus 2. The earth roll 8 is formed by forming an insulating coating such as silicon rubber on the outer peripheral surface of a metal cylinder.

  With respect to the earth roll 8, in this example, three horizontally long corona treatment discharge electrodes 10 are suspended in parallel to each other on a horizontal electrode support bar 11, and are opposed to the upper side of the earth roll 8. . As shown in FIGS. 4 and 5, these three discharge electrodes 10 are individually suspended from a hollow electrode support bar 11 by adjusting screw rods 12 at a plurality of locations, and are discharged between the earth roll 8. Individual adjustments can be made to make the gaps even. In addition, since the electrode support bar 11 is vertically suspended by the left and right cylinder devices 12A and 12B installed on the ceiling portion of the housing 4, the electrode support bar 11 is supported by the left and right cylinder devices 12A and 12B. The three corona treatment discharge electrodes 10 can be simultaneously retracted to the upper retracted position away from the earth roll 8.

  The discharge electrode 10 itself is obtained by enclosing a metal electrode core 14 in a protective pipe 13 which is a circular pipe made of a dielectric material such as ceramic, and leaf springs 15 attached to a plurality of locations of the electrode core 14 are protective pipes 13. The electrode core 14 is pressed against the lower part of the inner peripheral surface of the protective pipe 13 by being pressed against the upper part of the inner peripheral surface. At this time, the lower surface of the electrode core 14 is an arc surface along the arc of the inner peripheral surface of the protective pipe 13 so that the lower surface of the electrode core 14 is in close contact with the inner peripheral surface of the protective pipe 13.

  Each discharge electrode 10 is supported at the lower end of each adjustment screw rod 12 by an insulating member 16 made of glass, epoxy resin, or the like. A high voltage is simultaneously applied to the electrode cores 14 of the three discharge electrodes 10 through a high-voltage cable branched to them.

  Accordingly, corona discharge is generated from the three discharge electrodes 10 toward the outer peripheral surface of the earth roll 8, and the film 6 guided by the earth roll 8 is subjected to corona treatment. At that time, the outer peripheral surface of the earth roll 8 is covered with silicon rubber or the like, and the discharge electrode 10 is obtained by enclosing a metal electrode core 14 in a protective pipe 13 made of a dielectric material such as ceramic. Since the dielectric barrier discharge is stable and uniform over the entire length of the discharge electrode 10, the film 6 is subjected to corona treatment uniformly over a wide range. In addition, since the discharge is performed at a low temperature, there is no problem even in continuous operation for a long time, and the life of the discharge electrode 10 can be extended and the deformation of the film 6 can be prevented by a low-temperature corona treatment.

  The portion including the three discharge electrodes 10 and the support mechanism thereof is surrounded by front, rear, left and right side plates suspended from the electrode support bar 11 except for the lower surface facing the earth roll 8. By exhausting the air in the space through an ozone exhaust port 4 a provided on the side wall of the housing 4, ozone can be exhausted.

Next, the ion attraction type static eliminator 2 that neutralizes the film 6 after such corona treatment will be described.
The ion attraction type static eliminator 2 is installed at an intermediate portion in the housing 4, and as shown in FIG. 6, a vertical surface extending left and right and up and down is formed on the back surface of the vertical insulating plate 17 installed in the housing 4. On the other hand, for example, four positive and negative ion generating electrodes 20 are supported on an electrode base 19 installed in the housing 4 at intervals in the vertical direction. All of the ion generation electrodes 20 are opposed to the ion attraction electrodes 18 with a certain interval.

Further, below the lowermost positive / negative ion generation electrode 20, two DC static eliminators 21 that can switch between positive and negative polarities are supported by the electrode table 19 with a vertical interval therebetween, and below that An AC static eliminator 22 is installed, and further below that, a surface potential sensor 23 for detecting the surface potential of the film 6 and controlling the DC static eliminator 21 (and also controlling the AC static eliminator 22 as necessary). Is installed. Installation position of the two DC discharger 21 and the AC discharger 22 is configured so as gradually away from the passing position of the fill arm 6.

  In such an ion attraction type static eliminator 2, the positive and negative ion generation electrode 20 is connected to the positive and negative ion generation electrode 20 in synchronization with the application of positive and negative high voltages to the four positive and negative ion generation electrodes 20 alternately. Are applied alternately, so that positive and negative ions generated by the four positive and negative ion generation electrodes 20 are attracted by the common ion attraction electrode 18.

  Accordingly, since the film 6 corona-treated by the corona treatment apparatus 1 is vertically moved downward between the ion attracting electrode 18 and the positive / negative ion generating electrode 20, a number of positive and negative ions are counted before passing through the film. Repeatedly forcibly irradiates and is discharged with high density until the charged pattern disappears.

  Further, after the positive and negative neutralization unevenness is reduced by the DC static eliminator 21, the film 6 is further charged by the AC static eliminator 22 that is further away from the film 6 than the DC static eliminator 21 in order to perform weak static elimination. The charge is removed neatly until almost zero.

  As shown in FIG. 7, the film 6 that has been neutralized in this way is guided to the first relay roll 24 installed in the housing 4 directly below the ion-suction type static eliminator 2, and further, the first relay roll 24. The second relay roll 25 installed at the rear, the backup roll 26 of the dust removing device 3, and the third relay roll 27 installed slightly below the dust removing device 3 are guided to meander in an M shape.

  The dust removing device 3 is installed at a lower portion in the housing 4, and supports a horizontally long backup roll 26 rotatably on the left and right side walls of the housing 4. The backup roll 26 is attached to the outside of the side wall of the housing 4. By rotating with the drive motor 28, the film 6 is removed from the second relay roll 25 to the third relay roll 27 as follows.

  A horizontally long suction port member 29 that opens along the outer peripheral surface of the backup roll 26 is installed in close proximity so as to face the backup roll 26 in the front-rear direction. With respect to the suction port member 29, a suction duct 30 is installed in parallel with the suction port member 29 on the outside of the housing 4, and the suction port member 29 and the suction duct 30 are uniform from the entire length of the suction port member 29. It is connected at several points so that it can be sucked.

  In addition, a horizontally long blowing port member 31 is installed on the lower side of the suction port member 29, and the horizontally long slit-shaped blowing port of the blowing port member 31 blows air from below between the backup roll 26 and the suction port member 29. It is so oriented. For this air outlet member 31, an air duct 32 is installed in parallel with the air outlet member 31 on the outside of the housing 4, and the air outlet member 31 and the air duct 32 are uniform from the entire length of the air outlet member 31. It is connected in several places so that it can blow.

  Therefore, the film 6 that is meanderingly transferred as described above is wide on the outer peripheral surface of the backup roll 26 by the air blown from the horizontally long slit-like air blower of the air blower port member 31 and the suction by the suction port member 29. The dust is averagely removed over the entire length in the direction, and then guided forward at the lower end of the housing 4.

  In the above embodiment, only one side of the film 6 has been subjected to corona treatment, high-density static elimination, and dust removal. However, the corona treatment device 1, the ion attraction type static elimination device 2, and the dust removal device 3 are installed on the front and back surfaces of the film 6. For example, the front and back surfaces of the film 6 can be treated. Moreover, although the plastic film 6 was processed as a long process target object, this invention is applicable also to the surface treatment of other long process target objects, such as paper.

It is a front view of the surface treatment apparatus of one Example of this invention. It is the right view. It is the left view. It is a front view which shows the specific structure of the corona treatment apparatus in it. It is sectional drawing similarly. It is a side view which shows the specific structure of an ion attraction type static elimination apparatus. It is a side view which shows the mechanism inside a housing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Corona treatment apparatus 2 Ion suction type static elimination apparatus 3 Dust removal apparatus 4 Housing 4a Ozone exhaust port 5 Introducing side roll 6 Film 7 Outlet side roll 8 Grounding roll 9 Grounding roll drive motor 10 Corona processing discharge electrode 11 Electrode support bar 12 Adjustment screw Rod 12A / 12B Cylinder device 13 Protective pipe 14 Electrode core 15 Leaf spring 16 Insulating member 17 Insulating plate 18 Ion attracting electrode 19 Electrode base 20 Positive / negative ion generating electrode 21 DC neutralizer 22 AC neutralizer 23 Surface potential sensor 24 First relay roll 25 Second relay roll 26 Backup roll 27 Third relay roll 28 Backup roll drive motor 29 Suction port member 30 Suction duct 31 Blower port member 32 Blower duct

Claims (6)

A corona treatment device that corona-treats the surface of a long treatment object such as a film, and a static elimination device that neutralizes a long treatment object after corona treatment by the corona treatment device are arranged vertically in the same housing,
In the corona treatment device, the horizontally long corona treatment discharge electrode is pressed against the inner peripheral surface of the protective pipe by springs that are installed in a plurality of locations on the electrode core by installing a horizontally long electrode core in a protective pipe made of a dielectric. The corona treatment discharge electrode is parallel to the horizontally long earth roll, and the long object to be introduced into the housing is guided by the earth roll. While performing corona treatment by corona discharge from the corona treatment discharge electrode,
The static eliminator is configured such that a plurality of positive and negative ion generation electrodes are opposed to an ion attraction electrode with a space therebetween in the vertical direction, and positive and negative ion generation electrodes are generated while the positive and negative ions generated by the positive and negative ion generation electrodes are attracted by the ion attraction electrode. A surface treatment apparatus for a long processing object such as a film, wherein a long processing object is passed between the ion suction electrode and the ion attracting electrode so as to remove electricity at high density.   A dust removal device is installed vertically in the same housing as the corona treatment device and the charge removal device. This dust removal device has a horizontally long suction port member facing the backup roll, and has a horizontally long shape between the backup roll and the suction port member. Install a blower port member that blows air from the slit-shaped blower port, and blow the air from the blower port member while guiding the long processing target object with the backup roll, and suck it with the suction port member. The surface treatment apparatus for a long treatment object such as a film according to claim 1, wherein the object is dedusted and led out of the housing.   The introduction of the long processing object before processing into the housing is performed on one side before and after the housing, and the long processing target after processing is guided out of the housing on the other side before and after the housing. The surface treatment apparatus according to claim 1 or 2, characterized in that   The surface treatment apparatus according to claim 1, wherein a plurality of corona treatment discharge electrodes are arranged in parallel so that the gaps between the discharge electrodes for the corona treatment are equal to each other.   5. Each of the plurality of corona treatment discharge electrodes is suspended from an electrode support bar horizontally installed on the housing so as to be individually adjustable in height by an adjustment screw rod. Surface treatment equipment.   6. The ion-sucking electrode of the static eliminator has a plate-like shape having a vertical surface extending left and right and up and down, and all the positive and negative ion generating electrodes are opposed to the ion-sucking electrode. The surface treatment apparatus described in 1.

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